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Code Issues Releases Activity

move h264 idct to its own file and call via function pointer in DspContext

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allow h264 idct to be used for lowres=1

Originally committed as revision 3524 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2004-09-27 19:47:17 +00:00
parent 40028f8f6e
commit 0fa8158d3e
5 changed files with 92 additions and 43 deletions
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1
libavcodec/avcodec.h
View File

@ -1113,6 +1113,7 @@ typedef struct AVCodecContext {
#define FF_IDCT_ALTIVEC 8
#define FF_IDCT_SH4 9
#define FF_IDCT_SIMPLEARM 10
#define FF_IDCT_H264 11
/**
* slice count.

11
libavcodec/dsputil.c
View File

@ -3434,8 +3434,13 @@ void dsputil_init(DSPContext* c, AVCodecContext *avctx)
#endif //CONFIG_ENCODERS
if(avctx->lowres==1){
c->idct_put= ff_jref_idct4_put;
c->idct_add= ff_jref_idct4_add;
if(avctx->idct_algo==FF_IDCT_INT || avctx->idct_algo==FF_IDCT_AUTO){
c->idct_put= ff_jref_idct4_put;
c->idct_add= ff_jref_idct4_add;
}else{
c->idct_put= ff_h264_lowres_idct_put_c;
c->idct_add= ff_h264_lowres_idct_add_c;
}
c->idct = j_rev_dct4;
c->idct_permutation_type= FF_NO_IDCT_PERM;
}else if(avctx->lowres==2){
@ -3462,6 +3467,8 @@ void dsputil_init(DSPContext* c, AVCodecContext *avctx)
}
}
c->h264_idct_add= ff_h264_idct_add_c;
/* VP3 DSP support */
c->vp3_dsp_init = vp3_dsp_init_c;
c->vp3_idct = vp3_idct_c;

7
libavcodec/dsputil.h
View File

@ -50,6 +50,10 @@ void ff_fdct_mmx(DCTELEM *block);
void ff_fdct_mmx2(DCTELEM *block);
void ff_fdct_sse2(DCTELEM *block);
void ff_h264_idct_add_c(uint8_t *dst, DCTELEM *block, int stride);
void ff_h264_lowres_idct_add_c(uint8_t *dst, int stride, DCTELEM *block);
void ff_h264_lowres_idct_put_c(uint8_t *dst, int stride, DCTELEM *block);
/* encoding scans */
extern const uint8_t ff_alternate_horizontal_scan[64];
extern const uint8_t ff_alternate_vertical_scan[64];
@ -330,7 +334,8 @@ typedef struct DSPContext {
*/
void (*vp3_idct)(int16_t *input_data, int16_t *dequant_matrix,
int coeff_count, DCTELEM *output_samples);
void (*h264_idct_add)(uint8_t *dst, DCTELEM *block, int stride);
} DSPContext;
void dsputil_static_init(void);

46
libavcodec/h264.c
View File

@ -1323,40 +1323,6 @@ static inline int get_chroma_qp(H264Context *h, int qscale){
}
/**
*
*/
static void h264_add_idct_c(uint8_t *dst, DCTELEM *block, int stride){
int i;
uint8_t *cm = cropTbl + MAX_NEG_CROP;
block[0] += 32;
for(i=0; i<4; i++){
const int z0= block[0 + 4*i] + block[2 + 4*i];
const int z1= block[0 + 4*i] - block[2 + 4*i];
const int z2= (block[1 + 4*i]>>1) - block[3 + 4*i];
const int z3= block[1 + 4*i] + (block[3 + 4*i]>>1);
block[0 + 4*i]= z0 + z3;
block[1 + 4*i]= z1 + z2;
block[2 + 4*i]= z1 - z2;
block[3 + 4*i]= z0 - z3;
}
for(i=0; i<4; i++){
const int z0= block[i + 4*0] + block[i + 4*2];
const int z1= block[i + 4*0] - block[i + 4*2];
const int z2= (block[i + 4*1]>>1) - block[i + 4*3];
const int z3= block[i + 4*1] + (block[i + 4*3]>>1);
dst[i + 0*stride]= cm[ dst[i + 0*stride] + ((z0 + z3) >> 6) ];
dst[i + 1*stride]= cm[ dst[i + 1*stride] + ((z1 + z2) >> 6) ];
dst[i + 2*stride]= cm[ dst[i + 2*stride] + ((z1 - z2) >> 6) ];
dst[i + 3*stride]= cm[ dst[i + 3*stride] + ((z0 - z3) >> 6) ];
}
}
#if 0
static void h264_diff_dct_c(DCTELEM *block, uint8_t *src1, uint8_t *src2, int stride){
int i;
@ -2440,7 +2406,7 @@ static void hl_decode_mb(H264Context *h){
h->pred4x4[ dir ](ptr, topright, linesize);
if(h->non_zero_count_cache[ scan8[i] ]){
if(s->codec_id == CODEC_ID_H264)
h264_add_idct_c(ptr, h->mb + i*16, linesize);
s->dsp.h264_idct_add(ptr, h->mb + i*16, linesize);
else
svq3_add_idct_c(ptr, h->mb + i*16, linesize, s->qscale, 0);
}
@ -2467,7 +2433,7 @@ static void hl_decode_mb(H264Context *h){
for(i=0; i<16; i++){
if(h->non_zero_count_cache[ scan8[i] ] || h->mb[i*16]){ //FIXME benchmark weird rule, & below
uint8_t * const ptr= dest_y + h->block_offset[i];
h264_add_idct_c(ptr, h->mb + i*16, linesize);
s->dsp.h264_idct_add(ptr, h->mb + i*16, linesize);
}
}
}else{
@ -2487,13 +2453,13 @@ static void hl_decode_mb(H264Context *h){
for(i=16; i<16+4; i++){
if(h->non_zero_count_cache[ scan8[i] ] || h->mb[i*16]){
uint8_t * const ptr= dest_cb + h->block_offset[i];
h264_add_idct_c(ptr, h->mb + i*16, uvlinesize);
s->dsp.h264_idct_add(ptr, h->mb + i*16, uvlinesize);
}
}
for(i=20; i<20+4; i++){
if(h->non_zero_count_cache[ scan8[i] ] || h->mb[i*16]){
uint8_t * const ptr= dest_cr + h->block_offset[i];
h264_add_idct_c(ptr, h->mb + i*16, uvlinesize);
s->dsp.h264_idct_add(ptr, h->mb + i*16, uvlinesize);
}
}
}else{
@ -3232,7 +3198,7 @@ static inline int get_level_prefix(GetBitContext *gb){
log= 32 - av_log2(buf);
#ifdef TRACE
print_bin(buf>>(32-log), log);
printf("%5d %2d %3d lpr @%5d in %s get_level_prefix\n", buf>>(32-log), log, log-1, get_bits_count(gb), __FILE__);
av_log(NULL, AV_LOG_DEBUG, "%5d %2d %3d lpr @%5d in %s get_level_prefix\n", buf>>(32-log), log, log-1, get_bits_count(gb), __FILE__);
#endif
LAST_SKIP_BITS(re, gb, log);
@ -5975,7 +5941,7 @@ int main(){
}
// printf("\n");
h264_add_idct_c(ref, block, 4);
s->dsp.h264_idct_add(ref, block, 4);
/* for(j=0; j<16; j++){
printf("%d ", ref[j]);
}

70
libavcodec/h264idct.c Normal file
View File

@ -0,0 +1,70 @@
/*
* H.264 IDCT
* Copyright (c) 2004 Michael Niedermayer <michaelni@gmx.at>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
/**
* @file h264-idct.c
* H.264 IDCT.
* @author Michael Niedermayer <michaelni@gmx.at>
*/
#include "dsputil.h"
static always_inline void idct_internal(uint8_t *dst, DCTELEM *block, int stride, int block_stride, int shift, int add){
int i;
uint8_t *cm = cropTbl + MAX_NEG_CROP;
block[0] += 1<<(shift-1);
for(i=0; i<4; i++){
const int z0= block[0 + block_stride*i] + block[2 + block_stride*i];
const int z1= block[0 + block_stride*i] - block[2 + block_stride*i];
const int z2= (block[1 + block_stride*i]>>1) - block[3 + block_stride*i];
const int z3= block[1 + block_stride*i] + (block[3 + block_stride*i]>>1);
block[0 + block_stride*i]= z0 + z3;
block[1 + block_stride*i]= z1 + z2;
block[2 + block_stride*i]= z1 - z2;
block[3 + block_stride*i]= z0 - z3;
}
for(i=0; i<4; i++){
const int z0= block[i + block_stride*0] + block[i + block_stride*2];
const int z1= block[i + block_stride*0] - block[i + block_stride*2];
const int z2= (block[i + block_stride*1]>>1) - block[i + block_stride*3];
const int z3= block[i + block_stride*1] + (block[i + block_stride*3]>>1);
dst[i + 0*stride]= cm[ add*dst[i + 0*stride] + ((z0 + z3) >> shift) ];
dst[i + 1*stride]= cm[ add*dst[i + 1*stride] + ((z1 + z2) >> shift) ];
dst[i + 2*stride]= cm[ add*dst[i + 2*stride] + ((z1 - z2) >> shift) ];
dst[i + 3*stride]= cm[ add*dst[i + 3*stride] + ((z0 - z3) >> shift) ];
}
}
void ff_h264_idct_add_c(uint8_t *dst, DCTELEM *block, int stride){
idct_internal(dst, block, stride, 4, 6, 1);
}
void ff_h264_lowres_idct_add_c(uint8_t *dst, int stride, DCTELEM *block){
idct_internal(dst, block, stride, 8, 3, 1);
}
void ff_h264_lowres_idct_put_c(uint8_t *dst, int stride, DCTELEM *block){
idct_internal(dst, block, stride, 8, 3, 0);
}